Lathe



l. HINDNIAN.

LATHE. APPLICATION FILED SEPT-$1919,

Ptented m0. 2,1919.

WITNESSES l. E. HIND MAN.

LATHE.

APPLICATION FILED SEPT. 19, 1918.

Patented Dec. 2, 1919.

8 SHEETSSHEEI 2.

wrrms sm Patented Dec. 2, 1919.

8 SHEETSSHEI 4.

I. E. HINDMAN.

LATHE.

APPLICATION FILED SEPT. 19. 1918.

lllHh I. E. HINDMAN.

LATHE.

APPLICATION FILED SEPT. 19, 1918.

Patented Dec. 2, 1919.

8 SHEETSSHEEI 5.

WITNESSES l. E. HINDMAN.

LATHE.

APPLICATION FILED SEPT. l9, 19m.

Lfig fifi Patented Dec. 2,1919.

8 SHEETS-SHEEI 6.

1 gammbw I. E. HINDMAN.

LATHE.

V APPLICATION FILED SEPT. is, 1918. 1 33,63 Patented Dec. 2,1919,

' 8 SHEETSSHEET 7.

FWHZZ.

VJITNESSLES t n W %\& ws@mm3\u INVENTOW l. E. HINDMAN.

LATHE.

APPLICATlON FILED SEPT-b1918- WITNESSES isaaess.

" iTED STATES FTQ.

ISAIAH E. HINDMAN, OF BELLEVUE, PENNSYLVANIA, 'ASSIGNOR TO THE DUFFMANU- FACTURING COMPANY, A CORPORATION OF IENNSYLVANIA.

LATHE.

To all whom it may concern: Be it known that I,ISAIAH.E. HINDMAN,

a citizen of the United States,residing at I Bellevue, in the county ofAllegheny and State of Pennsylvania, have invented anew of thisspec-ificatlon, in which- Figure l is a front view of one formof latheto which my'improvements have been applied, j i

Fig. 2 is an end view of .the'same. Fig. 3 is a detail sectional. viewon, the

7 line III-1110f Fig. 4. f

Fig. 4 is a similar view on the'line I Y be best understood by referenceto the accompanying drawings, which will now be described, it beingpremised, h0wever,'that IVIV of Fig. 3.. Fig. 5 is a detailsectional-view 'ofrthe clutch on the line V-'.V of Fig. 6. I

Fig;

V IVI of Fig. 5.

Fig. 7 'is a detail plan view in skeleton form illustrating the clutchoperating devices and the hand mechanism fOFtllG lead screw.. f

Fig. 8 is a detail vertical sectional View through the clutch operatingshafts.

Fig. 9 is a detail sectional" view on the line IX'.IX of Fig. 11,showing one of the clutchesfor the quickreturn mechanism.

Fig." 10 is a detail face view of a portion" of one of theclutchmembers.- I

line XI-XI of Fig- 9,

Fig. 11 is a detail sectional 'Fig. 12 is a detail sectional viewillustrating the locking devices for the clutch} operating levers.

Fig. 13 is a facejview of the bracket for the clutch locking pin.

Figs. 14-and 15 are detail faceviews of the clutch levers, and Figs. 16,17 and 18 are trating the various positions occupied by the clutchlevers. Y

This invention relates to an improvement in lathes and is designed toprovide a cheap and'eflicient mechanism whereby the tool or the saddlecan be quickly returned to the starting of the out. Another object of myinvention is to provide mechanism which is so arranged that the speed ofthe lead screw can be accelerated to return the saddle or tool to thebeginning of the cut. A still further object of my invention is toprovide Specification of Letters Patent.

.A still .to provide hand actuated means for the lead screw which isarranged to, actuate the lead screw when both clutches are in theirinoperative positions.

. 6 is a similar view on'- the] line:

the saddle 5 is adapted to move. saddle 5 is arranged to-receive -theusual tool carriage 6 to operate on work which is 4 rotatedby thespindle 7 of the lathe. The view on the mounted" 1 in bearings 8*whichform part 0 ing for the spindle driving mechanism and is'driven bymeans'of-gearing .9-from a diagrams illus -1P'atented eas, iaie.

Application filed September 19, 1918. Serial No. 254,754.

' clutch mechanism for controlling the move- -ment of the leadscrewduring thecutting operatlon, as well as a clutch mechanism forcontrolling the quick return movement of the'tool', together with meansfor interlocking the clutch actuating-levers so that onlyone clutch canbe in operation at one time. i I

further object of my invention is Further objects of my 'invention will"readily beappreciated from the description and illustrations.

The precisenature of my invention will of construction of the variousparts as well as their arrangement, without. departing "from the spiritand scopeof my invention as defined in the appended claims.-

In the drawings, the reference character 2 designates the bedof thelathe which is supported on feet 3. This bed is provided withcylindrical ways or shears 4 on which spindle 7 of the lathe isrotatablfv h h t e ouspinion 10 on a, main power shaft 11. The mainpower shaft 11 is mounted in bearings connected to the head of the latheand keyed thereto .is a drivin pulley 13. Mounted on the end of the shat 11, adjacent to the pin- ,ion 10, is a clutch member which is moreclearly illustrated in Figs. 5 and 6, and comprises a clutch member 14keyed to the tated thereby. Loosely mounted on the shaft 11 andsurrounding the clutch member 14 is a. second clutch member 15, which isheld from endwise movement on the shaft by means of a collar 16.Interposed between the clutch members 14 and 15 are rollers 17, whichare arranged to lock the members 14 and 15 when the shaft is moved inone direction, but to permit free move- This shaft 11, and which isarranged to be roment of the clutch member 15 in the same direction asthe shaft is driven.

Loosely mounted on roller bearings 18 on the shaft 11 is a pulley 19which is connected to a sleeve 20 mounted within one of the bearings forthe shaft 11. Connected to the sleeve 20 is a clutch member 14 which issimilar to clutch member 14, and rotatably mounted on the shaft 11 andsurrounding the clutch member 14 is a second clutch member 15 similar tothe clutch member 15. This clutch member 15 is held from endwisemovement by means of a collar 21 connected to the shaft 11, thearrangement being such that when the loose pulley is operated, itsclutch member 15 will be rotated in the same direction as the clutchmember 15 when the belt is on the tight or power pulley 13.

Connected to the clutch member 15' ,is a sprocket wheel 22 which isconnected to a sprocketwheel 23 on a shaft 24, by means of a sprocketchain 25, and connected to the clutch member 15 is a similar sprocketwheel 22 which is connected to a sprocket wheel 23 on the shaft 24 bymeans of a sprocket chain 25; the arrangement being such that the shaft24 is driven when the belt iseither on the pulley 13 or the loose pulley19, for thepurpose hereinafter described.

26 is a gear wheel connected tothe shaft 24 and which meshes with a gearwheel 27. The gear wheel 27 is rotatably mounted on a split ring 28connected to a clutch 29, which is connected to a shaft 30. The splitring members 28 are secured to the hub of a the clutch member 29by meansof screws 31,

and 32 are wedge members between the ring members 28 which are arrangedto expand the ring members and force them into contact with the gearwheel 27, so that the shaft 30 will be rotated by means of the gearwheel 26. These wedge members are forced radially by means of one end ofa double cone member 33 mounted on the shaft .30, and which is arrangedto be moved endwise by a pinion 34 on a shaft 34 which extends from therear of the lathe to the front there of. This pinion 34 meshes with arack 35 mounted in a groove in the cone member 33, the arrangement beingsuch that the cone member can rotate with relation to the rack 35. 26 isa second gear wheel connected to the shaft 24, Which is arranged toactuate a gear wheel 27 through the medium of a pinion 27', thearrangement being such that the gear wheel 27 is rotated in the reversedirection from the gear wheel 27. This gear wheel 27 also forms part ofa clutch 29 similar to the clutch 29, and when the member 33 is moved tothe left the shaft 30 will be rotated in the same direction as the shaft24, and when the cone member 33 is moved to the right the shaft 30 willbe ro tated in the opposite direction from the shaft 24. hen, however,the cone 33 is in its central position the shaft 30 will remain idle, asneitherof the'clutches will be in driving connection therewith.

Rotatably mounted in suitable bearings in the bed of the lathe is a leadscrew 36, and

connected thereto at the front end of the being the same as that on thelathes of to' day, and comprises a pinion 41, connected'to the spindle 7of the lathe, which meshes with-a gear wheel 42connected to a pinion 43.The last mentioned pinion 43 meshes with a gear wheel 44 loosely mountedon the leadtscrew 36. Movably mounted on the lead screw 36 is a clutchmember 45 which is arranged to be moved into and out of engagement witha clutch member 46 on the gear wheel 44, so that when said clutchmembers v are in engagement with each'other, the lead screw will beoperated by means of the regular feed mechanism. 'Rotatably mounted inhearings on the front of the lathe are shafts 47, 48 .and 49. The shaft49 is connected to thegshaft34 by means of bevel gears 50 and 51,,sothat when said shaft is rotated in one direction the cone mem er 33 i onthe shaft 30 will be shifted to connect one tral or neutral position; orif moved far,

enough, will connect the other clutch member with the shaft 30. Theshaft 48 is connected bymeans of bevel gear wheels 52 and 53 with arockerarm 54 having a yoke 55 on the end thereof, which is connected tothe clutch member 451 When the rocker arm is moved in one direction, theclutch members 45 and 46 will be moved into engagement with each otherso that the lead screw 36 will be actuated by the lathe spindle.Connected to the shaft 47 and within a casing 56 on the front of thelathe is a sprocket wheel 57 which is connected by means of a sprocketchain 58, with a sprocket wheel 59 on the lead screw 36. 60 is an apronconnected to the saddle 5 and is provided with bearings for each of theshafts 47, 48 and 49, and is arranged to slide over said shafts when thecarriage is moved along the ways. Rotatably mounted in suitable bearingson the apron is a hand wheel 61 which is provided with a clutch member62 adapted to engage a clutch member 63 on a stub shaft 64 rotatablymounted in the apron. This stub shaft 64 is provided with a skew gearwhich meshes with a skew gear 65 on the shaft 47.

Inter-posed between the two clutch members 62 and 63 is a spring 66which is arranged to hold the clutch members out of engagement with eachother. 67 is a clutch actuating lever connected to the shaft 48 foractuating the clutch member 45, and 68 is a similar clutch leverconnected to the shaft -19 for actuating the cone member 33 for theclutches 29 and 29 2' These clutch levers 67 and 68 are on oppositesides of a bracket 69 which is connected to theapron, as can be 'moreclearly seen in Fig. 12. The clutch 68 are thrown to their neutral 7 6,land thereby lever 67 is provided with two detents 70 and 71 which arearranged to be engaged by a spring-pressed plug 72 mounted in the apronfor holding the lever 67 in its adjusted position. These detents 7 O and71 side of the lever adjacent to the apron. 73 is a third detent on theother side of the lever in the side adjacent to the bracket 69. Theyclutch lever 68 is provided with a spring-pressed plunger 7 4 which isarranged to engage a detent 74* in the bracket 69 whenthe clutch lever68 is in its central or neutral position. The side of the lever 68adjacent to the bracket 69 is provided with a detent .75, and slidablymounted in an opening in the bracket 69 is a pin 76 which is arranged tobe seated in the detents 73 and-75 in the levers 67 and 68,respectively. The pin 76 is arranged to prevent either of theclutch-levers 67 or 68 from being moved after the other lever is movedto throw its clutch into operative position. As shown in Fig. 12, thepin 7 6 is in line with the detents 73 arid 75,'so that either lever 67or 68 can ".befinoved asyboth clutches for the lead screw drivingmechanism are disconnected.

In the drawings, both' clutch levers 67 and positions, or the positionsin which both sets of lead screw driving mechanisms aredisconnected fromthe lead screw. If it is desired to throw the regular feeding mechanisminto operation, or the gears 41 to -14, the clutch lever 67 is elevatedto brine the detent-71 into register Withthc plug ,2. 1 ,This movementof the clutch lever willthrow the clutch member 15 into engagement withthe clutch member -16.

This movement of the clutch lever will also shittthe detent, out ofalinement with the pin against movement.

' In Figs. to 18. Thave diagrammatically illustrated the clutchlevers indifi'erent positions to clearly show how one of said members, is lockedagainst movement when the other lever has been moved to throw the clutchinto operative position. -In Fig. 17 both clutch levers are in theirneutral positions and the positions therein correspond are on they'1ak1.,the ,cliit'clr lever 68 "the driving pulley or the loose spindleand the lead screw, necting and Fa we been shifted to throw its clutchinto opera-' tion so that the pin 76 only registers with the opening 75in the clutch lever 68. In F ig. 18 the clutch lever 67 is in itsneutral position, while the lever 68 has been shifted to throw one ofits clutch members into operation, and in this case the pin 71 is onlyin register with the detent 73 in the lever 67, while the holding plug72 is in engagen'ient with the detent 70.

v The advantages of my invention result from the provision of quickreturn actuating mechanism for a lathe, which is arranged to operate thelead screw independent of the regular lead screw operatingmechanism,t0gether with clutch mechanisms arranged to connect either theregular lathe lead screw mechanism, or the quick return mechanism. Bythis arrangement I am enabled to use the lead screw for actuating thesaddle either by means of the regular feed mechanism or by means of thequick return mechanism, all of which are driven by the same belt. Theyresult furthermore. from the provision of lead screw actuating mechanismwhich is adapted to be actuated by the driving belt when the drivincrbelt is placed on the loose pulley, when the lathe spindle is at rest,furthermore, from the provision of a third lead screw actuatingmechanism whereby the lead screw may be actuated by hand when both ofthe power mechanisms are disconnected.

In some of the claims I have used the terms driving pulley and loosepulley, but desire it to be understood that these terms as used; arebroad enough to cover a fixed driving connection and a loose drivingconnection other than pulleys in which the fixed driving connectionperforms the same function as the driving pulley and the loose drivingconnection performs the same function as the loose loose pulley, andother means for actuating the lead screw arranged to'be connected topulley, substantially as described.

a 2. A lathe having a lead or feed screw for moving the tool holder, aspindle for rotating the Work, a driving pulley for the spindle, drivingmeans connecting the means for condisconnecting the driving meansbetweenthe spindle and the lead screw, a

loose pulley, other means for actuating the necting and disconnectingthe driving means 3. A lathe-having a lead or feed screw for f movingthe tool holder, aspindle for rotating the work, a driving pulley forthe spindle, driving spindle and the lead screw, means for conbetween(the spindle and-the lead screw, a

- loose pulley, other means for, actuating the lead" screw, clutchconnections between the driving pulley and the other means for actu-.

ating the lead screw,-clutch connections between the loose pulley andthe other means and reversible connections in the other means foractuating for actuating the lead screw,

the lead screw arranged to actuate the lead screw in either directionby'means of either the driving or loose pulley, substantiallyasdescribed.

t; A lathe having a lead or feed screw for moving the tool holder, aspindle for rotat- 1n sp1ndle,'. driving means connecting the spindleand the lead screw, means for connecting'and disconnecting the drivingmeans between the spindle and the lead screw, a loose pulley, othermeans for actuating the lead screw, clutch connections between thedriving pulley and the other means for actuating the lead screw,clutch-connections between the loose pulley and the other means foractuating the lead screw, reversible connections in the other means'foracuating the screw arranged to actuate the lead screw in eitherdirection by means of either the drivingor loose pulley, together withmeans for actuating said clutches, and interlocking devices arranged toprevent one actuating means for the lead screw from being thrown intooperation when .the other actuating means is in operation, substantiallyas'described.

5. A lathe having a lead screw for moving the tool holder, a spindle forrotating the work, a driving shaft, a driving pulley on said shaft,actuating connections between for rotating the the shaft and spindlespindle, aloose pulley on the driving shaft, driving connections betweenthe spindle and the lead screw, driving connections between the loosepulley and the lead screw, and

means for connecting either the driving shaft or the loose pulley to thelead screw, substantially as described.

' 6. A lathe having a lead screw for moving the tool holder, a spindlefor rotating the work, a driving shaft, a driving pulley on said shaft,actuating connections between the shaft and spindle for rotating thespindle, a loose pulley on the driving shaft,

' either the driving means connecting the I spindle andthe lead screw,

the work, a} driving pulley for the.

the screw from the into operation when driving connections between theloose pulley and the lead screw, means for connecting shaft or the loosepulley to the lead screw, and interlocking connections between said lastmentioned means and the first mentioned means forconnecting anddisconnecting the driving means between the :spindle and "the lead screwarranged to prevent-the throwing of one mechanism into. operation whenthe other is .in operation, substantially as described.

7. A lathe having a lead or feed screw for moving the tool holder, ingthe work, driving means for the spindle,

driving means connecting the spindle and the lead screw, a clutch forconnecting and dlsconnecting-the driving means between the actuating the"lead. screw. connected to thespindle driving means, a clutchlin thelast a spindle for rotatother means for mentioned means for actuatingthescrew adapted to connect and disconnect the screw from the drivingmeans, and interlocking connections between said clutches for preventingone clutch-from being'thrown into operation when the other clutch is inoperation, substantially as described.

4 8. A lathe having a lead or feed screw for moving the tool holder, aspindle for rotating the worlndriving means forthe spindle, drivingmeans'jconnecting the spindle and disconnecting the the spindle and thelead screw, other means for actuating the leadscrew connected to thespindle driving means, a clutch in the last mentioned the leadserew, aclutch-for connecting and driving means between means for actuating thep screw adapted to connect and disconnect driving means, .interlockingconnections. between said clutches for preventing one clutch from beingthrown the other clutch is in operation, and a third hand actuated meansfor the lead screw arranged to actuate the" lead screw when the clutchesare out of enagement, substantially as described.

9. A lathe havin a lead or feed screw for moving the tool ho der, aspindle for rotating the work, a driving pulley for, the spindle,driving means connecting the spindle and the lead screw, meansfor-connecting and disconnecting the driving means between thespindleand the lead screw, a loose pulley,-other means foractuating thelead screw arranged tobe connected to the driving pulley or the loosepulley, and hand actuated means substantially as described.

10. A lathe having a leadscrew "for moving the tool holder, a drivingshaft, a spindle for rotating the work, actuating connections forrotating the lead screw,fi-.

between the driving shaft and the spindle,

a loose pulley-on the driving shaft, feed screw actuating mechanismconnecting the driving :shaft with the lead screw, feed screw actuatingmechanism connecting, the loose pulley with the lead screw, andreversible connections in the lead screw driving mechanism arranged torotate the lead screw in either direction when connected with either thedriving shaft or the loose pulley, substantially as described.

11. A lathehaving a spindle for rotating the work, a driving shaft,actuating connections for the spindle connected to the driving shaft, aloose pulley on the driving shaft, a one-way clutching member on the.

driving shaft arranged to rotatethe spindle driving mechanism when thedriving shaft is rotated by the driving pulley, a one-way clutchconnection between the loose pulley and the lead screw actuatingmechanism arranged to actuate said mechanism when the loose pulley isrotated in one direction, and reversible clutching connections in thelead screw driving mechanism arranged to rotate said lead screw ineither direction when connected with the driving shaft or the loose,pulley, substantially 'asdescribed.

12. A lathe having a lead or feed screw for moving the tool holder, aspindle for rotating the work, driving means for the spindle including atight pulley, driving means connecting the spindle and the lead screw,means for connecting and disconnecting the driving means between thespindle and the lead screw, other means for driving the lead screwconnected thereto and the driving means for the spindle, means forconnecting and disconnecting said last mentioned driving means, a loosepulley adjacent to the other pulley, and drivin connections between theloose pulley an the last mentioned driving means for the lead screw,

substantially as described.

13. A lathe having a lead or feed screw for moving the tool holder, aspindle for rotating the work, driving means for the spindle, drivingmeans connecting the spindle and the lead screw,- a clutch forconnecting and disconnecting the driving means between the spindle andthe lead screw, a quick returning mechanism connecting the lead screwand the spindle driving means, said quick return means-including areverse motion, and a plurality of clutches in said quick return meansfor rotating the lead screw in either direction thereby, substantiallyas described.

14. A lathe having a lead or feed screw for moving the tool holder, aspindle for rotating the work, driving means for the spindle, drivingmeans connecting the spindle and the lead screw, a clutch for connectingand disconnectin the driving means between the spindle an the leadscrew, a quick return mechanism connecting the lead screw and thespindle driving means, said quick return means including a reverse mo-.tion, a plurality of clutches insaid quick return means for rotatingthe lead screw in either direction thereby, and hand operated means foractuating the lead screw independent of either of the other lead screwactuating mechanisms, substantially as dey scribed.

15. A quick return mechanism for a lathe comprising a shaft, means forrotating said shaft, connections between said means and the lathespindle foractuating the lathe spindle, a second shaft, a lead screw,driving connections between the second shaft and the lead screw, aplurality of drivin connections between the first and second shaftsarranged to rotate the shaft in either In hand.

y ISAIAH E. ll-HNDMAN.

